pinctrl: samsung: Allow per-bank SoC-specific private data

This patch extends pin bank descriptor structure with SoC-specific
private data field that allows SoC-specific drivers to store their own
private data.

Signed-off-by: Tomasz Figa <t.figa@samsung.com>
Signed-off-by: Kyungmin Park <kyungmin.park@samsung.com>
Tested-by: Doug Anderson <dianders@chromium.org>
Signed-off-by: Linus Walleij <linus.walleij@linaro.org>
diff --git a/drivers/pinctrl/pinctrl-samsung.h b/drivers/pinctrl/pinctrl-samsung.h
index b316d9f..26d3519 100644
--- a/drivers/pinctrl/pinctrl-samsung.h
+++ b/drivers/pinctrl/pinctrl-samsung.h
@@ -139,6 +139,7 @@
 	u32		eint_mask;
 	u32		eint_offset;
 	char		*name;
+	void		*soc_priv;
 	struct device_node *of_node;
 	struct samsung_pinctrl_drv_data *drvdata;
 	struct irq_domain *irq_domain;